Stapler



FIG. 1 is a front perspective view of a stapler showing the new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is left side elevational view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a top thereof;

FIG. 7 is a rear elevational view thereof; and,

FIG. 8 is a front elevational view thereof. 

The ornamental design for a stapler, as shown and described. 